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Finding the Fourth Proportional to 259,228.20, 388,404.90 and 125,821.20

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Solution

The fourth proportional to 259,228.20, 388,404.90 and 125,821.20 is: 188,519.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,228.20 : 388,404.90 = 125,821.20 : x
  2. Step 2: Convert to fraction form
    259,228.20/388,404.90 = 125,821.20/x
  3. Step 3: Cross multiply
    259,228.20x = 388,404.90 × 125,821.20
  4. Step 4: Simplify right side
    259,228.20x = 48,869,570,603.88
  5. Step 5: Solve for x
    x = 48,869,570,603.88/259,228.20
  6. Step 6: Final answer
    x = 188,519.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.